I'm laughing with you, not at you. We've all made that kind of mistake.
With humidity what matters is how much total moisture the eggs have lost during the entire time, from when they were laid until hatch. Instantaneous humidity isn't that important until you get to lockdown. What is more important is the average humidity and different averages work for different ones of us. Low or high humidity should not stop them developing until late in incubation. Sounds like yours stopped early.
Yes, it is unusual for none of the eggs to hatch. I'll link a couple of articles that might give you insight into what might have happened.
Trouble Shooting Failures with Egg Incubation | Mississippi State University Extension Service (msstate.edu)
Common Incubation Problems: Causes and Remedies (ucanr.edu)
Opening most of the eggs could give you some good clues as to when they stopped developing if you still have them. For a complete failure like this I'd think maybe a temperature spike that killed the embryos. You've had too much success otherwise.